Remove note about package immutability (github#1193)

Co-authored-by: Lucas Costi <lucascosti@users.noreply.github.com>

content/packages/managing-container-images-with-github-container-registry/deleting-a-container-image.md

@@ -16,10 +16,6 @@ To delete a container image, you must have admin permissions to the container im
 
 When deleting public packages, be aware that you may break projects that depend on your package.
 
-### Reserved package versions and names
-
-{% data reusables.package_registry.package-immutability %}
-
 ### Deleting a version of a user-owned container image on {% data variables.product.prodname_dotcom %}
 
 {% data reusables.package_registry.package-settings-from-user-level %}

content/packages/publishing-and-managing-packages/deleting-a-package.md

@@ -35,10 +35,6 @@ At this time, {% data variables.product.prodname_registry %} on {% data variable
 
 {% endif %}
 
-### Reserved package versions and names
-
-{% data reusables.package_registry.package-immutability %}
-
 ### Deleting a version of a private package on {% data variables.product.product_name %}
 
 To delete a private package version, you must have admin permissions in the repository.

content/packages/publishing-and-managing-packages/publishing-a-package.md

@@ -18,8 +18,6 @@ You can help people understand and use your package by providing a description a
 
 {% data reusables.package_registry.public-or-private-packages %} A repository can contain more than one package. To prevent confusion, make sure the README and description clearly provide information about each package.
 
-{% data reusables.package_registry.package-immutability %}
-
 {% if currentVersion == "free-pro-team@latest" %}
 If a new version of a package fixes a security vulnerability, you should publish a security advisory in your repository. {% data variables.product.prodname_dotcom %} reviews each published security advisory and may use it to send {% data variables.product.prodname_dependabot_alerts %} to affected repositories. For more information, see "[About GitHub Security Advisories](/github/managing-security-vulnerabilities/about-github-security-advisories)."
 {% endif %}